Yes

you do need a jacket based on the weather in Amherst (Amherst Center), Massachusetts, United States 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
53°F12°C & Mostly Clear

Wind is 3 mph5 km/h from the Southeast, gusting to 6 mph9 km/h
October 19
1am53°F12°C3 mph5 km/h SoutheastPartly Cloudy
2am52°F11°C4 mph7 km/h SoutheastMostly Clear
3am51°F10°C4 mph7 km/h SoutheastMostly Cloudy
4am50°F10°C4 mph7 km/h SoutheastMostly Clear
5am49°F10°C6 mph9 km/h SoutheastPartly Cloudy
6am49°F9°C4 mph6 km/h SoutheastPartly Cloudy
7am48°F9°C5 mph8 km/h SoutheastMostly Cloudy
8am47°F8°C4 mph6 km/h SoutheastMostly Clear
9am46°F8°C3 mph5 km/h SouthMostly Clear
10am46°F8°C4 mph6 km/h SoutheastPartly Cloudy
11am46°F8°C3 mph5 km/h SoutheastMostly Clear
12pm47°F8°C4 mph6 km/h SoutheastMostly Cloudy
DateLowHighWindDayNight
October 1835°F2°C63°F17°C1 mph2 km/h from SouthwestMostly ClearPartly Cloudy
October 1946°F8°C68°F20°C8 mph13 km/h from SouthPartly CloudyRain
October 2051°F11°C64°F18°C11 mph17 km/h from SouthHeavy RainPartly Cloudy
October 2145°F7°C61°F16°C7 mph12 km/h from SouthwestMostly ClearPartly Cloudy
October 2246°F8°C62°F17°C7 mph11 km/h from SouthwestRainMostly Clear
October 2341°F5°C56°F13°C6 mph9 km/h from SouthwestPartly CloudyMostly Clear
October 2438°F3°C55°F13°C5 mph8 km/h from WestPartly CloudyMostly Clear

Yes

Low of 46°F8°C, High of 68°F20°C
Wind: 8 mph13 km/h
Precipitation: None

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